<section class="sidenav-content">
  <a *ngFor="let item of topLvlLinks" [routerLink]="item.path" class="nav-link active">
    {{item.label}}
  </a>
  <section *ngFor="let group of groups" class="nav-group collapsible">
    <input id="{{'group_' + group.id}}" type="checkbox">
    <label for="{{'group_' + group.id}}">{{group.label}}</label>
    <ul class="nav-list">
      <li *ngFor="let item of group.children">
        <a class="nav-link" [routerLink]="item.path">{{item.label}}</a>
      </li>
    </ul>
  </section>
</section>